20397143649268 has 12 divisors (see below), whose sum is σ = 35696628254560. Its totient is φ = 10198107005112.

The previous prime is 20397143649247. The next prime is 20397143649269. The reversal of 20397143649268 is 86294634179302.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20397143649269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116106138 + ... + 116281681.

Almost surely, 2^{20397143649268} is an apocalyptic number.

It is an amenable number.

20397143649268 is a deficient number, since it is larger than the sum of its proper divisors (15299484605292).

20397143649268 is a wasteful number, since it uses less digits than its factorization.

20397143649268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232409766 (or 232409764 counting only the distinct ones).

The product of its (nonzero) digits is 94058496, while the sum is 64.

The spelling of 20397143649268 in words is "twenty trillion, three hundred ninety-seven billion, one hundred forty-three million, six hundred forty-nine thousand, two hundred sixty-eight".